FallbackOrder specifies the order in which different definition update sources should be contacted by Windows Defender. Windows Defender is an application that can prevent, remove, and quarantine malware (malicious software) and spyware.
Specifies <order> in which different definition update sources should be contacted by Windows Defender. <Order> is a string that should be entered as multiple enumerated values for the definition update sources separated by the pipe character, "|", to represent the desired order.
Possible values for <order> are:
An example of how to specify the order of multiple definition update sources is:
Valid Configuration Passes
Security-Malware-Windows-Defender | FallbackOrder
For Windows Windows Server 2016 editions, Windows Defender is installed with the operating system.
For Windows Server 2012, Windows Server 2008 R2 and Windows Server 2008, Windows Defender is installed with the Desktop Experience Pack.
For a full list of the Windows editions and architectures that this component supports, see Security-Malware-Windows-Defender.
The following XML output shows how to specify the order for contacting the Windows Defender update definition sources in the following order: internal definition update server, Microsoft Update, MMPC.
<FallbackOrder>InternalDefinitionUpdateServer | MicrosoftUpdateServer | MMPC</FallbackOrder>